[14540] in Athena Bugs
sun4 8.0A: sunsoft.new and /usr/include/sys/timeb.h
daemon@ATHENA.MIT.EDU (Ezra Peisach)
Tue Aug 13 15:39:07 1996
To: bugs@MIT.EDU
Date: Tue, 13 Aug 1996 15:39:03 EDT
From: Ezra Peisach <epeisach@MIT.EDU>
System name: dcl
Type and version: SPARC/5 8.0A (1 update(s) to same version)
Display type: cgthree
What were you trying to do?
Compile and use a program which uses a struct timeb
What's wrong:
Unaligned errors
What should have happened:
Program should work.
Please describe any relevant documentation references:
Personally - I think this is a fault of the Sun include file
sys/timeb.h.
Compile this program and get a core dump
------------------------------------------
#include <sys/time.h>
#include <sys/timeb.h>
main()
{
time_t t;
struct timeb foo;
/* time(&foo.time);*/
t = time((time_t *)0);
foo.time = t;
printf("Time %d\n", t);
}
------------------------------------------------------------------
a) If I use suncc -malign2 - everything works
b) Gcc works fine with this file.
c) I suspect that the problem stems from the fact that
/usr/include/sys/timeb.h has the pack pragma - which causes the
structure to not be aligned on a 4 byte boundary. Either suncc is
botching it by not realizing that it will need to be careful when
accessing the elements of the structure - or the header file should not
have the pragma....
#if defined(__STDC__)
#pragma pack(2)
#endif
/*
* Structure returned by ftime system call
*/
struct timeb {
time_t time; /* time, seconds since the epoch */
unsigned short millitm; /* 1000 msec of additional accuracy */
short timezone; /* timezone, minutes west of GMT */
short dstflag; /* daylight savings when appropriate? */
};
#if defined(__STDC__)
#pragma pack()
#endif
